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        <a href="oauth2client-module.html">Package&nbsp;oauth2client</a> ::
        <a href="oauth2client.gce-module.html">Module&nbsp;gce</a> ::
        Class&nbsp;AppAssertionCredentials
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class AppAssertionCredentials</h1><p class="nomargin-top"><span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials">source&nbsp;code</a></span></p>
<center>
<center>  <map id="uml_class_diagram_for_oauth2cl_44" name="uml_class_diagram_for_oauth2cl_44">
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<pre class="literalblock">
Credentials object for Compute Engine Assertion Grants

This object will allow a Compute Engine instance to identify itself to
Google and other OAuth 2.0 servers that can verify assertions. It can be used
for the purpose of accessing data stored under an account assigned to the
Compute Engine instance itself.

This credential does not require a flow to instantiate because it represents
a two legged flow, and therefore has all of the required information to
generate and refresh its own access tokens.

</pre>

<!-- ==================== INSTANCE METHODS ==================== -->
<a name="section-InstanceMethods"></a>
<table class="summary" border="1" cellpadding="3"
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      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="oauth2client.gce.AppAssertionCredentials-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">scope</span>,
        <span class="summary-sig-arg">**kwargs</span>)</span><br />
      Constructor for AppAssertionCredentials</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials.__init__">source&nbsp;code</a></span>
            
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="oauth2client.gce.AppAssertionCredentials-class.html#_refresh" class="summary-sig-name" onclick="show_private();">_refresh</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">http_request</span>)</span><br />
      Refreshes the access_token.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials._refresh">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="oauth2client.gce.AppAssertionCredentials-class.html#serialization_data" class="summary-sig-name">serialization_data</a>(<span class="summary-sig-arg">self</span>)</span><br />
      Get the fields and their values identifying the current credentials.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials.serialization_data">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="oauth2client.gce.AppAssertionCredentials-class.html#create_scoped_required" class="summary-sig-name">create_scoped_required</a>(<span class="summary-sig-arg">self</span>)</span><br />
      Whether this Credentials object is scopeless.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials.create_scoped_required">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="oauth2client.gce.AppAssertionCredentials-class.html#create_scoped" class="summary-sig-name">create_scoped</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">scopes</span>)</span><br />
      Create a Credentials object for the given scopes.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials.create_scoped">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
  <tr>
    <td colspan="2" class="summary">
    <div class="private">    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="oauth2client.client.AssertionCredentials-class.html">client.AssertionCredentials</a></code></b> (private):
      <code><a href="oauth2client.client.AssertionCredentials-class.html#_generate_assertion" onclick="show_private();">_generate_assertion</a></code>,
      <code><a href="oauth2client.client.AssertionCredentials-class.html#_generate_refresh_request_body" onclick="show_private();">_generate_refresh_request_body</a></code>,
      <code><a href="oauth2client.client.AssertionCredentials-class.html#_revoke" onclick="show_private();">_revoke</a></code>
      </p></div>
    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="oauth2client.client.OAuth2Credentials-class.html">client.OAuth2Credentials</a></code></b>:
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#__getstate__">__getstate__</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#__setstate__">__setstate__</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#access_token_expired">access_token_expired</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#apply">apply</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#authorize">authorize</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#get_access_token">get_access_token</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#refresh">refresh</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#revoke">revoke</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#set_store">set_store</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#to_json">to_json</a></code>
      </p>
    <div class="private">    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="oauth2client.client.OAuth2Credentials-class.html">client.OAuth2Credentials</a></code></b> (private):
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#_do_refresh_request" onclick="show_private();">_do_refresh_request</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#_do_revoke" onclick="show_private();">_do_revoke</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#_expires_in" onclick="show_private();">_expires_in</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#_generate_refresh_request_headers" onclick="show_private();">_generate_refresh_request_headers</a></code>,
      <code><a href="oauth2client.client.OAuth2Credentials-class.html#_updateFromCredential" onclick="show_private();">_updateFromCredential</a></code>
      </p></div>
    <div class="private">    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="oauth2client.client.Credentials-class.html">client.Credentials</a></code></b> (private):
      <code><a href="oauth2client.client.Credentials-class.html#_to_json" onclick="show_private();">_to_json</a></code>
      </p></div>
    <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
      <code>__delattr__</code>,
      <code>__format__</code>,
      <code>__getattribute__</code>,
      <code>__hash__</code>,
      <code>__new__</code>,
      <code>__reduce__</code>,
      <code>__reduce_ex__</code>,
      <code>__repr__</code>,
      <code>__setattr__</code>,
      <code>__sizeof__</code>,
      <code>__str__</code>,
      <code>__subclasshook__</code>
      </p>
    </td>
  </tr>
</table>
<!-- ==================== CLASS METHODS ==================== -->
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<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="oauth2client.gce.AppAssertionCredentials-class.html#from_json" class="summary-sig-name">from_json</a>(<span class="summary-sig-arg">cls</span>,
        <span class="summary-sig-arg">json_data</span>)</span><br />
      Instantiate a Credentials object from a JSON description of it.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials.from_json">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
  <tr>
    <td colspan="2" class="summary">
    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="oauth2client.client.Credentials-class.html">client.Credentials</a></code></b>:
      <code><a href="oauth2client.client.Credentials-class.html#new_from_json">new_from_json</a></code>
      </p>
    </td>
  </tr>
</table>
<!-- ==================== STATIC METHODS ==================== -->
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       cellspacing="0" width="100%" bgcolor="white">
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         >hide private</a>]</span></td>
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  </td>
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  <tr>
    <td colspan="2" class="summary">
    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="oauth2client.client.GoogleCredentials-class.html">client.GoogleCredentials</a></code></b>:
      <code><a href="oauth2client.client.GoogleCredentials-class.html#from_stream">from_stream</a></code>,
      <code><a href="oauth2client.client.GoogleCredentials-class.html#get_application_default">get_application_default</a></code>
      </p>
    </td>
  </tr>
</table>
<!-- ==================== CLASS VARIABLES ==================== -->
<a name="section-ClassVariables"></a>
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       cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
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    <table border="0" cellpadding="0" cellspacing="0" width="100%">
      <tr valign="top">
        <td align="left"><span class="table-header">Class Variables</span></td>
        <td align="right" valign="top"
         ><span class="options">[<a href="#section-ClassVariables"
         class="privatelink" onclick="toggle_private();"
         >hide private</a>]</span></td>
      </tr>
    </table>
  </td>
</tr>
  <tr>
    <td colspan="2" class="summary">
    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="oauth2client.client.Credentials-class.html">client.Credentials</a></code></b>:
      <code><a href="oauth2client.client.Credentials-class.html#NON_SERIALIZED_MEMBERS">NON_SERIALIZED_MEMBERS</a></code>
      </p>
    </td>
  </tr>
</table>
<!-- ==================== PROPERTIES ==================== -->
<a name="section-Properties"></a>
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       cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
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        <td align="left"><span class="table-header">Properties</span></td>
        <td align="right" valign="top"
         ><span class="options">[<a href="#section-Properties"
         class="privatelink" onclick="toggle_private();"
         >hide private</a>]</span></td>
      </tr>
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</tr>
  <tr>
    <td colspan="2" class="summary">
    <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
      <code>__class__</code>
      </p>
    </td>
  </tr>
</table>
<!-- ==================== METHOD DETAILS ==================== -->
<a name="section-MethodDetails"></a>
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        <td align="left"><span class="table-header">Method Details</span></td>
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         ><span class="options">[<a href="#section-MethodDetails"
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<a name="__init__"></a>
<div>
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       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">scope</span>,
        <span class="sig-arg">**kwargs</span>)</span>
    <br /><em class="fname">(Constructor)</em>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials.__init__">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <pre class="literalblock">
Constructor for AppAssertionCredentials

Args:
  scope: string or iterable of strings, scope(s) of the credentials being
    requested.

</pre>
  <dl class="fields">
    <dt>Decorators:</dt>
    <dd><ul class="nomargin-top">
        <li><code>@util.positional(2)</code></li>
    </ul></dd>
    <dt>Overrides:
        object.__init__
    </dt>
  </dl>
</td></tr></table>
</div>
<a name="from_json"></a>
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       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">from_json</span>(<span class="sig-arg">cls</span>,
        <span class="sig-arg">json_data</span>)</span>
    <br /><em class="fname">Class Method</em>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials.from_json">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <pre class="literalblock">
Instantiate a Credentials object from a JSON description of it. The JSON
should have been produced by calling .to_json() on the object.

Args:
  data: dict, A deserialized JSON object.

Returns:
  An instance of a Credentials subclass.

</pre>
  <dl class="fields">
    <dt>Overrides:
        <a href="oauth2client.client.Credentials-class.html#from_json">client.Credentials.from_json</a>
        <dd><em class="note">(inherited documentation)</em></dd>
    </dt>
  </dl>
</td></tr></table>
</div>
<a name="_refresh"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">_refresh</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">http_request</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials._refresh">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <pre class="literalblock">
Refreshes the access_token.

Skip all the storage hoops and just refresh using the API.

Args:
  http_request: callable, a callable that matches the method signature of
    httplib2.Http.request, used to make the refresh request.

Raises:
  AccessTokenRefreshError: When the refresh fails.

</pre>
  <dl class="fields">
    <dt>Overrides:
        <a href="oauth2client.client.OAuth2Credentials-class.html#_refresh" onclick="show_private();">client.OAuth2Credentials._refresh</a>
    </dt>
  </dl>
</td></tr></table>
</div>
<a name="serialization_data"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">serialization_data</span>(<span class="sig-arg">self</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials.serialization_data">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <pre class="literalblock">
Get the fields and their values identifying the current credentials.

</pre>
  <dl class="fields">
    <dt>Decorators:</dt>
    <dd><ul class="nomargin-top">
        <li><code>@property</code></li>
    </ul></dd>
    <dt>Overrides:
        <a href="oauth2client.client.GoogleCredentials-class.html#serialization_data">client.GoogleCredentials.serialization_data</a>
        <dd><em class="note">(inherited documentation)</em></dd>
    </dt>
  </dl>
</td></tr></table>
</div>
<a name="create_scoped_required"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">create_scoped_required</span>(<span class="sig-arg">self</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials.create_scoped_required">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <pre class="literalblock">
Whether this Credentials object is scopeless.

create_scoped(scopes) method needs to be called in order to create
a Credentials object for API calls.

</pre>
  <dl class="fields">
    <dt>Overrides:
        <a href="oauth2client.client.GoogleCredentials-class.html#create_scoped_required">client.GoogleCredentials.create_scoped_required</a>
        <dd><em class="note">(inherited documentation)</em></dd>
    </dt>
  </dl>
</td></tr></table>
</div>
<a name="create_scoped"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">create_scoped</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">scopes</span>)</span>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="oauth2client.gce-pysrc.html#AppAssertionCredentials.create_scoped">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <pre class="literalblock">
Create a Credentials object for the given scopes.

The Credentials type is preserved.

</pre>
  <dl class="fields">
    <dt>Overrides:
        <a href="oauth2client.client.GoogleCredentials-class.html#create_scoped">client.GoogleCredentials.create_scoped</a>
        <dd><em class="note">(inherited documentation)</em></dd>
    </dt>
  </dl>
</td></tr></table>
</div>
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